linux USB摄像头不停掉线问题

是专家不是砖家2025-11-05 16:01

1.T507板子上面接了一个usb接口的RGB摄像头，发现RGB摄像头有时候一开机就掉线了，或者跑一会掉线，dmesg看到的现象如下

复制代码

    sunxi-ehci 5101000.ehci0-controller: ehci_irq: highspeed device disconnect

    sunxi-ehci 5101000.ehci0-controller: ehci irq: highspeed device connect

    usb 1-1: USB disconnect, device number 2

    uvcvideo: Failed to resubmit video URB (-19).
   
    uvcvideo: Failed to resubmit video URB (-19).
	
	uvcvideo: Failed to resubmit video URB (-19).
	
	uvcvideo: Failed to resubmit video URB (-19).
	
	uvcvideo: Failed to resubmit video URB (-19).
    
    sunxi-ehci 5101000.ehci0-controller: ehci_irq: highspeed device connect

    usb 1-1: new high-speed USB device number 3 using sunxi-ehci
    
    usb 1-1: device descriptor read/64, error -71
    
    usb 1-1: device descriptor read/64, error -71

    usb 1-1: new high-speed USB device number 4 using sunxi-ehci
	
    usb 1-1: device descriptor read/64, error -71

    uvcvideo: Found UVC 1.00 device DECXIN CAMERA (1bcf:2cd1)
 
    uvcvideo 1-1:1.0: Entity type for entity Extension 4 was not initialized!

    uvcvideo 1-1:1.0: Entity type for entity Extension 3 was not initialized!
   
    uvcvideo 1-1:1.0: Entity type for entity Processing 2 was not initialized!
    uvcvideo 1-1:1.0: Entity type for entity Camera 1 was not initialized!
	
	input: DECXIN CAMERA as /devices/platform/soc/5101000.ehci0-controller/usb1/1-1/1-1:1.0/input/input6

2.后面观察到，usb会不停的掉线，上线

3.应用层是通过固定的设备节点/dev/video4去读取RGB图像的，RGB一掉线，出图节点就变成了/dev/video5，导致应用层读取不到RGB图像了。

4.解决办法，查询了AI，禁用 USB 电源管理（排除 autosuspend）就没出现这个问题了。

复制代码

# 一次性禁用所有 USB 设备的 suspend
for f in /sys/bus/usb/devices/*/power/control; do
    echo 'on' > "$f"
done